Celestial hemisphere:  Northern  ·  Constellation: Perseus (Per)  ·  Contains:  Double cluster  ·  NGC 869  ·  NGC 884  ·  The star 7Per
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The Double Cluster in Perseus, Hap Griffin
The Double Cluster in Perseus
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The Double Cluster in Perseus

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The Double Cluster in Perseus, Hap Griffin
The Double Cluster in Perseus
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The Double Cluster in Perseus

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Description

The "Double Cluster", also known as NGC884 (on the left) and NGC869 (on the right). It appears in the constellation of Perseus and is weakly visible to the naked eye from dark locations and easily seen in binoculars. From the chemistry of the stars in the two clusters, we can tell that they are much younger than our Sun at only about 13 million years old. Stars are generally formed in clusters that condense out of a single large cloud of hydrogen and dust. This is an example of two clusters that formed near each other, only separated by a few hundred light years, and at the same time. They both lie at a distance of 7000 light years from us. At that distance, they are only visible because of their size and brilliance...each star much larger than our Sun and thousands of times brighter.

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The Double Cluster in Perseus, Hap Griffin